From 0a64dac604564fc7544a4cc5d232b95871c6514c Mon Sep 17 00:00:00 2001
From: Takayuki Maeda <takoyaki0316@gmail.com>
Date: Fri, 5 May 2023 17:28:52 +0900
Subject: [PATCH] remove unnecessary attribute from a diagnostic

---
 compiler/rustc_hir_analysis/src/errors.rs   |  1 -
 tests/ui/specialization/issue-111232.rs     | 11 +++++++++++
 tests/ui/specialization/issue-111232.stderr | 11 +++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 tests/ui/specialization/issue-111232.rs
 create mode 100644 tests/ui/specialization/issue-111232.stderr

diff --git a/compiler/rustc_hir_analysis/src/errors.rs b/compiler/rustc_hir_analysis/src/errors.rs
index c0ee777722e73..30e2c675f59d5 100644
--- a/compiler/rustc_hir_analysis/src/errors.rs
+++ b/compiler/rustc_hir_analysis/src/errors.rs
@@ -657,7 +657,6 @@ pub enum ImplNotMarkedDefault {
     #[note]
     Err {
         #[primary_span]
-        #[label]
         span: Span,
         cname: Symbol,
         ident: Symbol,
diff --git a/tests/ui/specialization/issue-111232.rs b/tests/ui/specialization/issue-111232.rs
new file mode 100644
index 0000000000000..3ed3c580e6d12
--- /dev/null
+++ b/tests/ui/specialization/issue-111232.rs
@@ -0,0 +1,11 @@
+#![feature(min_specialization)]
+
+struct S;
+
+impl From<S> for S {
+    fn from(s: S) -> S { //~ ERROR `from` specializes an item from a parent `impl`, but that item is not marked `default`
+        s
+    }
+}
+
+fn main() {}
diff --git a/tests/ui/specialization/issue-111232.stderr b/tests/ui/specialization/issue-111232.stderr
new file mode 100644
index 0000000000000..27ee42fc00c00
--- /dev/null
+++ b/tests/ui/specialization/issue-111232.stderr
@@ -0,0 +1,11 @@
+error[E0520]: `from` specializes an item from a parent `impl`, but that item is not marked `default`
+  --> $DIR/issue-111232.rs:6:5
+   |
+LL |     fn from(s: S) -> S {
+   |     ^^^^^^^^^^^^^^^^^^
+   |
+   = note: parent implementation is in crate `core`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0520`.